Book support



FIG. 1 is a perspective view of the book support showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view taken from the left of FIG. 1;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a side elevational view taken from the right of FIG. 1. 

The ornamental design for a book support, substantially as shown. 